Survey Analysis

Survey analysis in spsurvey is designed to produce population estimates based on information from the site evaluations and the indicator results. These results are either categorical or continuous variables. Continuous variables may include censored values (mainly left-censored for non-detects). It is typical that population estimates are wanted for multiple domains (sub-populations) and multiple variables. The analysis package must accommodate this. The package "survey" by Thomas Lumley is designed for survey analyses when have finite populations. Issue is whether spsurvey can (or should) use "survey" for continuous populations in finite regions. If so, then much of the current spsurvey analysis functions will not need to be redone. The "survey" package does not include an option for the local neighborhood variance estimator so that will have to be added. Incorporating non-detects is also an area that needs attention.

Estimating Means

Estimating Proportions

Estimating CDFs